Are They Different?

[crocophk]

Good morning guys.

Im planning to buy catback exhaust (Fujitsubo legalis r) and the advertisement says it is for r34 gtt,

I have gt, is it still suitable for my gt??

[SKITTLES]

Whats the piping diametre?

Edit: only reason I ask is because if it's for a GTT i assume it'll be >=3", which will give you crappy back pressure. Less performance etc.

You're best off looking at a 2.5". If you're located around the northmead area I know a guy who can go a little cheaper than Castle Hill Exhaust.

Edited September 20, 2011 by SKITTLES

[crocophk]

So u r saying its suitable but less efficient?

[-Jimmy-]

It'll be fine @ 3" diameter.

[crocophk]

ok cool, i decide to get it. Thanks guys!

[mad082]

if it's 3" it will be loud. turbo's act a bit like a muffler so that means that a 3" exhaust on a turbo car will be much quieter than on a non turbo.

also being 3" you may find a loss in low end power as 3" is much too big for a small displacement engine.

[Jonno34]

2.5" is loud enough mate!

custom made is better imo .. 2.5" with a few mufflers in the middle and a nice oval on the end

[Socrates]

+1 to custom.

I would think that 2in would be fine for RB25DE as my L24S is 0.1 of a L smaller.

Or have i gone too small?, or carburettored vs EFI should have different size exhausts?

[Jonno34]

I think a RB25DE (my r34 gt) had a 2.25" exhaust from factory - correct me if im wrong but from when i was searching around on threads on exhaust thats what i found if i can remember.

[Miguelone]

I think a RB25DE (my r34 gt) had a 2.25" exhaust from factory - correct me if im wrong but from when i was searching around on threads on exhaust thats what i found if i can remember.

My 33 has a 2.5" cat forward then after the cat it narrows down to about 1.8". Turbo exhausts are 2.5" from factory and GTR exhausts are 3" I think. If this is the case I've been thinking about swapping in a factory Turbo Exhaust.

[mad082]

My 33 has a 2.5" cat forward then after the cat it narrows down to about 1.8". Turbo exhausts are 2.5" from factory and GTR exhausts are 3" I think. If this is the case I've been thinking about swapping in a factory Turbo Exhaust.

yeah stock turbos are 2.5" and they are a good option to put on. good flow with good mufflers.

[10 4]

+1 to custom.

I would think that 2in would be fine for RB25DE as my L24S is 0.1 of a L smaller.

Or have i gone too small?, or carburettored vs EFI should have different size exhausts?

Socs.. lol.

RB25DE R34 makes 200 @ fly.

L24s (a long time ago) 125hp @ fly...

2.5" is good for NA skylines..

Got a 2.5" catback on sisters S13 and it made 105rwhp through an auto box. - 235kms.

[mad082]

Socs.. lol.

RB25DE R34 makes 200 @ fly.

L24s (a long time ago) 125hp @ fly...

2.5" is good for NA skylines..

Got a 2.5" catback on sisters S13 and it made 105rwhp through an auto box. - 235kms.

and the missus SSS (which makes about 10kw less at the fly than a S13) makes about 115hp at the wheels with a 2" exhaust.

[crocophk]

As i said i just installed 3" Fujitsubo legalis r catback exhaust on my r34 gt and it absolutely sounds deeper and quieter. The previous exhaust was 2.25" custom catback and was louder and crappy. i think it depends on what brand it is so custom exhaust can have a lot more various sounds. anyway thank you very much for ur recommandation! but i could not give up the name and its value FUJITSUBO haha.

Edited September 25, 2011 by crocophk

[10 4]

and the missus SSS (which makes about 10kw less at the fly than a S13) makes about 115hp at the wheels with a 2" exhaust.

Same kms? Auto box? Neglected and not serviced like hers? =/

[mad082]

nah, much lower kms, manual box and looked after. was just pissing in the wind, lol

[10 4]

mmm, golden showers